body {
    background: url("../img/background.jpg") no-repeat center;

}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.big_div {
    border: 8px solid #eeeeee;
    width: 900px;
    height: 500px;
    background-color: white;
    margin: auto;
    padding: 15px;
    margin-top: 15px;
}

.left_div {
    float: left;
    margin: 15px;
}

.left_div .rg_p {
    color: #FFD026;
    font-size: 20px;
}

.left_div .rg_p2 {
    color: #a6a6a6;
    font-size: 20px;
}

.center_div {
    width: 450px;
    float: left;
}

.td_left {
    width: 100px;
    height: 45px;
    text-align: right;
}

.td_right {
    padding-left: 50px;
}

#username, #password, #Email, #name, #phone, #birthday {
    width: 200px;
    height: 30px;
    border: 1px solid gray;
    border-radius: 4px;
    padding-left: 10px;
}

#code {
    width: 100px;
    height: 30px;
    border: 1px solid gray;
    border-radius: 4px;
    padding-left: 10px;
}

#submit {
    width: 100px;
    height: 40px;
    background-color: #FFD026;
    border-radius: 4px;
    border: 1px solid #FFD026;
    margin-top: 20px;
    margin-left: 150px;
}

.right_div {
    float: right;
    margin: 15px;
}

.right_div .rg_p3 a {
    color: pink;
}

.error{
    color: red;
    font-size: 10px;
}